Luminescent fish

The information from this article is from the fan game {{{game}}} or fan fiction and is therefore not canon.

Luminescent fish are tiny fish that produce a natural glow. Their diet seems to consist mostly of Sea grass. Graham found a school of these feeding off of sea grass and was able to catch some of them in an empty bottle. With their help, Graham was able to light his way through the caverns that lead to the lair of the Sharkees.